And the ameri



(No Model.) 2 Sheets-Sheet 1.

. W. HUMANS.

MAGNET() ELECTRIC DOOR PULL.

N0. 336.518. Patented Feb. 16, 1886.

'fall Y (No Model.) 2 Sheets--Sheet 2.

W. HUMANS,

MAGNET@ ELECTRIC DooE PULL. 110.386,618. Patented Feb. 16, 1886.

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:V01 il?? i. l. n E Il WJTWESSES n n .541086, W lIAN/AMOR wUNITED Srnrns Parnrrr trice.

GILMAN COLLAMORE, OF BOSTON,

MASSACHUSETTS, AND THE AMERI- CAN MAGNETIC ELECTRIC COMPANY, OF JERSEY CITY, NEY JERSEY.

NZGNETO-ELECTRG DOORHFULL.

`3I"ECEIJICIALION forming part of Letters Patent No. 336,518, lated February 16, 1.886.

y Application filed July i6, lSSl. Serial No. 137,360.

To @ZZ whom it may concern,.-

Be it known that l1, WILLIAM Humans, a citizen of the Dominion of Canada, residing at Cambridgeport, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in a Magneto-Electric Door-Pull; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use tlie'same, reference bcing had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to bell-pulls; and it consists in the improvements and combinations of parts hereinafter fully described and explained, wherein I am not only enabled to provide a bell-pull and accessories that are of comparatively simple and inexpensive construction, but also a device that will electrically actuate the signal or alarm bell in a positive and eiective manner.

In the accompanying drawings, forming part of this specification, Figure l is a perspective view of my improved doorpnll device, the electric and other operating parts being contained within the rectangular case, Fig. 2 is an end elevation of myimprovement, the rectangular case being removed. Fig. 3 is a plan view of the interior arrangement of the electric and other operating parts, one of the sections Of the compound field-magnet being removed to more clearly illustrate important features. Fig. e is an enlarged transverse sectional view taken on the dotted line 1 2, Fig. 3. Fig. 5 is an enlarged perspective view of the armature employed in myimprovement, and Fig. 6 is a cross-section. taken on the dotted line 3 4 or" Fig. 3, and Fig. 7 adetail view.

The invention consists, primarily, in utilizing the movement of a doorvpull or pullspindle to drive a magneto-electric generator by intermediate devices, the current generated being employed to aetuate a signal or alarm bell, the said intermediate devices being so constructed and disposed as to permit the armature of the generator to attain an oper- (No model.)

ating degree of rotation before the operative 5o circuit is closed, which closing of the circuit occurs automatically.

By reference to the drawings, A A represent the sections of a compound horseshoemagnet, which are bolted together by means of screws or other fastening devices adapted. t0 engage the openings a formed in said magnets. The section A is provided on its inner face near the front edge of its bend with two parallel lugs, b, and has a channel or depression, c, extending across said bend located in part between said lugs and adapted, when the section Ais in position, to register with a like channel or depression, c', in the bend of the same.

Bis aface-plate, against which the pull-knob C is normally adapted to bear, and the said faceplate is held rigidly relative to the compound magnet by means of parallel blocks d, cast on the rear side of said faceplate, and designed to be clamped between the bent portions of themagnetwsections A A', in order to permit said blocks to bear against the sides of the lugs Z), to prevent lateral displacement of said face-plate, while inwardly-projecting ears d, formed on the blocks d, embrace the end portions of said lugs and resists strain tending to move said blocks from between said magnets, A square opening is formed in the central portion of the faceplate, adjacent to the end of the channel formed by the depressions c c', and through this opening passes the knob or pull-spindle D, which is connected at its front end to the pull-knob C, and bears in and is guided by the depressions c c'.

The polar extensions e c, with the sections A A, constitute the field-magnets of a magneto-generator, the said terminals having secured thereto for this purpose iield-extensions E, the projecting polarportions c of which are concaved on their adjacent faces, to contain between them the armature. These polar eX- tensions E of the eld-magnets are connected together at their ends by means of heads c,of brass or other suitable non-rnagnetic material. The end head e farthest from the pull-spindle is centrally perforated to receive one of the bearing spindles f of the armature F,

which bearing-spindle is incased in an insulating-sleeve, f2, surrounded by a metallic journal, f3. The core of the armature is enlarged at each end to present the poles g g', which are each convexed on their outer faces, to accord with the concaved faces of the projecting portions e of the field-extensions E, and move in close proximity thereto. `The head e nearest the end of the pull-spindle D is cut away to form a large opening, as shown in Fig. 4. A bracket, h, is secured to one side of the cut-away head e', so as to project opposite the opening in said head, and is perforated to form a bearing for the armaturespindle. A small gear-pinion, h', located adjacent to the bracket h, runs loosely on the armature-spindle, a ratchet-wheel, h2, turning with said pinion,being adapted, on its forward rotation, to engage a spring-pawl, h3, secured on the adjacent armature-head. The bracket h is provided with a perforation, in which .bears one end of a small worm-shaft, H,

the other end of said shaft, being reduced to bear in a perforation formed in a bracket, I, secured on one side of the magnet-section A', near its bend. The end of said shaft H projects considerably beyond the said bracket, and is adapted to contact against a steel or other hard-metal screw or abutment, i, secured in the said section A. A pin, J, is rigidly secured on one side of the magnet-section A', near the bracket h, and the said pin has secured thereto one end of a coiled spring, j, to the free end of which isattached a chain or belt, j', consisting of jointed sections ji, capable of being coiled around the spring. A gear-wheel, K, is rigidly secured on the shaft H, so as to mesh with the pinion h. A nut, L, is perforated for the passage of the shaft H, the said perforation being such as to accord with the pitch of the worm on said shalt, in order that the movement of said nut along said shaft may effect a rotation of the same in its bearings. The said nut L is recessed to permit the forked portionl of the pull-spindle B to embrace said nut,in order to effect a connection between the two, but allowing the spindle to be moved laterally to move the nut when it binds on the worm shaft, to overcome any irregularities of the screw.

M represents a .yoke-shaped rod,which consists of the bent end portions m m and connecting-portion m2, the latter being pivoted at about its center by means of a pivot-pin or screw, m3, bearing in the magnet-section A. The polar extension E,adjacent to theyokc M, is providedwith a horizontal recess designed to receive a coiled spring, n, the projecting portion of which bears against the yoke M at one side of its pivot, and thereby tends to normally maintain the end of the portion m in contact with the armature-spindle. By placing the spring a in the recess I am enabled to employ in the reduced space a very powerl ful spring, and one not readily calculated to loose its tension.

The portion m of the yoke-rod consists of two independent scctionsyone being formed by the bent portion of the rod, while the end section consists of a contact blade or switch, n', the two sections being united and insulated from each other by means of a block, a2, of gutta-percha or other suitable insulator. The helix O is coiled aroundthe armature-core, one terminal being connected to the circuitcontactf, insulated from the armature by the block f2',while the other terminal is connected to the armature-core, the line-wires leading from the spindle to the binding-screws N N, located on the end of the poles of the section A,"they screw N being insulated from the permanent magnets.' Connection is established between the contact blade or switch a by means of a Wire, o', with the binding-screw insulated from the magnet. The end of the bent portion m is so disposed as to normally contact with the end of the knob-spindle D, and be forced slightly backward to compress the spring n and ordinarily hold the blade n out of contact with the adjacent circuit-point fto break the circuit. Now, when the pullknob is grasped and the spindle D moves out- Ward -it wil-l cause the nut L to rapidly rotate the worm-shaft H, thereby driving the gearwheel and pinion so that the ratchet-wheel h2 willengage the spring-pawl h3, andV thereby correspondingly rotate the armature. Of course as the spindle D moves out of contact with the portion mof the yoke-rod the spring a will actY to force the blade a into contact with the adjacent circuit-point f, to complete the circuit, thereby not completing the circuit until the armature has attained a working degree of rotation. rlhe position of the yokerod M is such that when the spring n forces the blade u into contact with the said circuitpoint f the said blade will slide across the end of the same, and thereby not only secure a positive contact therewith, but by its friction remove impurities or corrosions that may have accumulated on the contacting faces. When the pull-knob is released, the tension of the spring j will wind the chain or beltj around said spring and effect the restoration of the parts to their original position. The reverse travel of the nut L occasions a reverse rotation of the worm-shaft H, which of course reverses the rotation of the pinion and ratchet-wheel on the armatureshaft, but does not engage the spring-pawl on the armaturehead, and consequently does not effect a reverse movement of the armature. rangement of the flexible chain permits the spindle D to move outward to its fullest extent, and winds up the spring j, in order that in unwinding, it may effect the automatic return of said spindle and knob.

From the foregoing it will be apparent that my improvement embodies not only simplicity of construction, but provides for the various adjustments in a convenient manner, and renders the apparatus both desirable and effective in operation. Moreover, it will be apparent that by attaching the spindle to The ar- IfO IIO

some moving portion of a windowsash or door the device may act to set off a burglar-alarm. fIhe pin .I bears in the section A', and has a slot to receive the inner end of the springj, the other end of said pin being threaded to receive a set-nut located in a slot, to enable said pin to be turned and held in position by the nut, to regulate the tension of the spring j, said tension regulating the pull on the spindle. rIhe case P is a rectangular receptacle, which is adapted to emb 1acc the magnets and Working parts of the device, as seen in Fig. l, to exclude dust, tbc., from said working parts, and also to permit the transportation of said working parts Without liability of derangement. The end portion, p, of said case I is perforated for the passage of the line-Wires, and is constructed from non-conducting material. A n insulating-block (not shown, but readily understood) is secured ou t-he inside ofthe end portion, p, to prevent the Wires from becoming` grounded. By bevcling one side of the project-ion i the same may be readily turned to take up wear that may occur on the end of the Wormshaft.

non-magnetic materialto inclose the magnets, which case can be readily removed in case of repairs, and, moreover, enables me to insert the bell-pull magnets and operating parts in a small space when required. The pin s, passing through the forked portion of the spindle D, limits the movement of said forked portion with respect to the nut L.

l. rIhe combination, in a magneto-electric doorpull, of a magneto electric machine, spindle D, nut L, worm-shaft H, and wheel K, substantially as set forth.

2. The combination, in a magneto-electric door-pull, ofa magneto-electric machine, knob C. spindle D, nut L, worm-shaft H, and'cogwheel K, substantially as set forth.

3. rIlhe combination, in a magnetoelectric door-pull, ofa magneto-electric machine, spindle D, belt or ehainj', springj, and post J, substantially as set forth.

i i l The combination, in a magnetoelectric l door-pull, of a magneto-electric machine, spindle D, beltj, springj, post J, worm H, and nut L, substantially as set forth.

5. The combination, in a magneto-electric door-pull, ofa magneto-electric machine, spin dle D, Worm-shaft H, Wheel K, and pinion h', substantially as set forth.

6. The combination, in a magneto-electric door-pull, ofa spindle, D, Worm-shaft H, Wheel K, pinion h', pawl h, and armature and magnets, substantially as set forth.

7. The combination, in a magneto-electric door-pull, of a spindle, D, nut L, Worni-shaft H, gears K 7i', armature-coil o, magnet, and circuit, substantially as set forth.

8. The combination, in a magneto-electric door-pull, of a magnetoelectric machine, a spindle, D, circuit-breaker M, spring` n', and pivot in, substantially as set forth.

9. The combination, in a magneto-electric door-pull, of a magneto-electric machine, spindle D, circuit-breaker M, insulating-block f, electrode, and electric-circuit point j', substantiall y as set forth.

I0. The combination, in a magneto-electric door-pull, of a magneto-electric machine, spin The case I may be constructed from some 2 dle D, nut L, Wormshaft H, bracket It, stationary cap, and an adjustable cap, i, substantially as set forth.

1I. The combination, in a. magneto electric doonpull, of a face-plate, B, spindle D, nut L, `worm-shaft H, permanent magnet, armature-coil o, and circuit-breaker M, subst-antially as set forth.

l2. The combination, in a magnetofelectric door-pull, of the circuit-point f, insulating block fl, armature-coil 0, and circuit-breaker M, substantially as set forth.

13. The combination, in a magneto-electric door-pull, of the bell-pull C, face-plate B, lugs b, and magnets, armature, and devices for rotating the same upon the movement ofthe bell-pull, substantially as set forth.

In testimony whereof I affix my signaturein presence of two witnesses.

WILLIAM I-IUMANS.

Witnesses:

R. G. S. GOLLAMORE, W intuir PAXTON. 

